drivers/soc/fsl/qbman/qman_portal.c

   1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
   2  *
   3  * Redistribution and use in source and binary forms, with or without
   4  * modification, are permitted provided that the following conditions are met:
   5  *     * Redistributions of source code must retain the above copyright
   6  *       notice, this list of conditions and the following disclaimer.
   7  *     * Redistributions in binary form must reproduce the above copyright
   8  *       notice, this list of conditions and the following disclaimer in the
   9  *       documentation and/or other materials provided with the distribution.
  10  *     * Neither the name of Freescale Semiconductor nor the
  11  *       names of its contributors may be used to endorse or promote products
  12  *       derived from this software without specific prior written permission.
  13  *
  14  * ALTERNATIVELY, this software may be distributed under the terms of the
  15  * GNU General Public License ("GPL") as published by the Free Software
  16  * Foundation, either version 2 of that License or (at your option) any
  17  * later version.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
  20  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "qman_priv.h"
  32
  33 struct qman_portal *qman_dma_portal;
  34 EXPORT_SYMBOL(qman_dma_portal);
  35
  36 /* Enable portal interupts (as opposed to polling mode) */
  37 #define CONFIG_FSL_DPA_PIRQ_SLOW  1
  38 #define CONFIG_FSL_DPA_PIRQ_FAST  1
  39
  40 static struct cpumask portal_cpus;
  41 static int __qman_portals_probed;
  42 /* protect qman global registers and global data shared among portals */
  43 static DEFINE_SPINLOCK(qman_lock);
  44
  45 static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu)
  46 {
  47 #ifdef CONFIG_FSL_PAMU
  48         struct device *dev = pcfg->dev;
  49         int window_count = 1;
  50         struct iommu_domain_geometry geom_attr;
  51         struct pamu_stash_attribute stash_attr;
  52         int ret;
  53
  54         pcfg->iommu_domain = iommu_domain_alloc(&platform_bus_type);
  55         if (!pcfg->iommu_domain) {
  56                 dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__);
  57                 goto no_iommu;
  58         }
  59         geom_attr.aperture_start = 0;
  60         geom_attr.aperture_end =
  61                 ((dma_addr_t)1 << min(8 * sizeof(dma_addr_t), (size_t)36)) - 1;
  62         geom_attr.force_aperture = true;
  63         ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_GEOMETRY,
  64                                     &geom_attr);
  65         if (ret < 0) {
  66                 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__,
  67                         ret);
  68                 goto out_domain_free;
  69         }
  70         ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_WINDOWS,
  71                                     &window_count);
  72         if (ret < 0) {
  73                 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__,
  74                         ret);
  75                 goto out_domain_free;
  76         }
  77         stash_attr.cpu = cpu;
  78         stash_attr.cache = PAMU_ATTR_CACHE_L1;
  79         ret = iommu_domain_set_attr(pcfg->iommu_domain,
  80                                     DOMAIN_ATTR_FSL_PAMU_STASH,
  81                                     &stash_attr);
  82         if (ret < 0) {
  83                 dev_err(dev, "%s(): iommu_domain_set_attr() = %d",
  84                         __func__, ret);
  85                 goto out_domain_free;
  86         }
  87         ret = iommu_domain_window_enable(pcfg->iommu_domain, 0, 0, 1ULL << 36,
  88                                          IOMMU_READ | IOMMU_WRITE);
  89         if (ret < 0) {
  90                 dev_err(dev, "%s(): iommu_domain_window_enable() = %d",
  91                         __func__, ret);
  92                 goto out_domain_free;
  93         }
  94         ret = iommu_attach_device(pcfg->iommu_domain, dev);
  95         if (ret < 0) {
  96                 dev_err(dev, "%s(): iommu_device_attach() = %d", __func__,
  97                         ret);
  98                 goto out_domain_free;
  99         }
 100         ret = iommu_domain_set_attr(pcfg->iommu_domain,
 101                                     DOMAIN_ATTR_FSL_PAMU_ENABLE,
 102                                     &window_count);
 103         if (ret < 0) {
 104                 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__,
 105                         ret);
 106                 goto out_detach_device;
 107         }
 108
 109 no_iommu:
 110 #endif
 111         qman_set_sdest(pcfg->channel, cpu);
 112
 113         return;
 114
 115 #ifdef CONFIG_FSL_PAMU
 116 out_detach_device:
 117         iommu_detach_device(pcfg->iommu_domain, NULL);
 118 out_domain_free:
 119         iommu_domain_free(pcfg->iommu_domain);
 120         pcfg->iommu_domain = NULL;
 121 #endif
 122 }
 123
 124 static struct qman_portal *init_pcfg(struct qm_portal_config *pcfg)
 125 {
 126         struct qman_portal *p;
 127         u32 irq_sources = 0;
 128
 129         /* We need the same LIODN offset for all portals */
 130         qman_liodn_fixup(pcfg->channel);
 131
 132         pcfg->iommu_domain = NULL;
 133         portal_set_cpu(pcfg, pcfg->cpu);
 134
 135         p = qman_create_affine_portal(pcfg, NULL);
 136         if (!p) {
 137                 dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n",
 138                          __func__, pcfg->cpu);
 139                 return NULL;
 140         }
 141
 142         /* Determine what should be interrupt-vs-poll driven */
 143 #ifdef CONFIG_FSL_DPA_PIRQ_SLOW
 144         irq_sources |= QM_PIRQ_EQCI | QM_PIRQ_EQRI | QM_PIRQ_MRI |
 145                        QM_PIRQ_CSCI;
 146 #endif
 147 #ifdef CONFIG_FSL_DPA_PIRQ_FAST
 148         irq_sources |= QM_PIRQ_DQRI;
 149 #endif
 150         qman_p_irqsource_add(p, irq_sources);
 151
 152         spin_lock(&qman_lock);
 153         if (cpumask_equal(&portal_cpus, cpu_possible_mask)) {
 154                 /* all assigned portals are initialized now */
 155                 qman_init_cgr_all();
 156         }
 157
 158         if (!qman_dma_portal)
 159                 qman_dma_portal = p;
 160
 161         spin_unlock(&qman_lock);
 162
 163         dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu);
 164
 165         return p;
 166 }
 167
 168 static void qman_portal_update_sdest(const struct qm_portal_config *pcfg,
 169                                                         unsigned int cpu)
 170 {
 171 #ifdef CONFIG_FSL_PAMU /* TODO */
 172         struct pamu_stash_attribute stash_attr;
 173         int ret;
 174
 175         if (pcfg->iommu_domain) {
 176                 stash_attr.cpu = cpu;
 177                 stash_attr.cache = PAMU_ATTR_CACHE_L1;
 178                 ret = iommu_domain_set_attr(pcfg->iommu_domain,
 179                                 DOMAIN_ATTR_FSL_PAMU_STASH, &stash_attr);
 180                 if (ret < 0) {
 181                         dev_err(pcfg->dev,
 182                                 "Failed to update pamu stash setting\n");
 183                         return;
 184                 }
 185         }
 186 #endif
 187         qman_set_sdest(pcfg->channel, cpu);
 188 }
 189
 190 static int qman_offline_cpu(unsigned int cpu)
 191 {
 192         struct qman_portal *p;
 193         const struct qm_portal_config *pcfg;
 194
 195         p = affine_portals[cpu];
 196         if (p) {
 197                 pcfg = qman_get_qm_portal_config(p);
 198                 if (pcfg) {
 199                         /* select any other online CPU */
 200                         cpu = cpumask_any_but(cpu_online_mask, cpu);
 201                         irq_set_affinity(pcfg->irq, cpumask_of(cpu));
 202                         qman_portal_update_sdest(pcfg, cpu);
 203                 }
 204         }
 205         return 0;
 206 }
 207
 208 static int qman_online_cpu(unsigned int cpu)
 209 {
 210         struct qman_portal *p;
 211         const struct qm_portal_config *pcfg;
 212
 213         p = affine_portals[cpu];
 214         if (p) {
 215                 pcfg = qman_get_qm_portal_config(p);
 216                 if (pcfg) {
 217                         irq_set_affinity(pcfg->irq, cpumask_of(cpu));
 218                         qman_portal_update_sdest(pcfg, cpu);
 219                 }
 220         }
 221         return 0;
 222 }
 223
 224 int qman_portals_probed(void)
 225 {
 226         return __qman_portals_probed;
 227 }
 228 EXPORT_SYMBOL_GPL(qman_portals_probed);
 229
 230 static int qman_portal_probe(struct platform_device *pdev)
 231 {
 232         struct device *dev = &pdev->dev;
 233         struct device_node *node = dev->of_node;
 234         struct qm_portal_config *pcfg;
 235         struct resource *addr_phys[2];
 236         int irq, cpu, err;
 237         u32 val;
 238
 239         err = qman_is_probed();
 240         if (!err)
 241                 return -EPROBE_DEFER;
 242         if (err < 0) {
 243                 dev_err(&pdev->dev, "failing probe due to qman probe error\n");
 244                 return -ENODEV;
 245         }
 246
 247         pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
 248         if (!pcfg) {
 249                 __qman_portals_probed = -1;
 250                 return -ENOMEM;
 251         }
 252
 253         pcfg->dev = dev;
 254
 255         addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM,
 256                                              DPAA_PORTAL_CE);
 257         if (!addr_phys[0]) {
 258                 dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node);
 259                 goto err_ioremap1;
 260         }
 261
 262         addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM,
 263                                              DPAA_PORTAL_CI);
 264         if (!addr_phys[1]) {
 265                 dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node);
 266                 goto err_ioremap1;
 267         }
 268
 269         err = of_property_read_u32(node, "cell-index", &val);
 270         if (err) {
 271                 dev_err(dev, "Can't get %pOF property 'cell-index'\n", node);
 272                 __qman_portals_probed = -1;
 273                 return err;
 274         }
 275         pcfg->channel = val;
 276         pcfg->cpu = -1;
 277         irq = platform_get_irq(pdev, 0);
 278         if (irq <= 0) {
 279                 dev_err(dev, "Can't get %pOF IRQ\n", node);
 280                 goto err_ioremap1;
 281         }
 282         pcfg->irq = irq;
 283
 284         pcfg->addr_virt_ce = memremap(addr_phys[0]->start,
 285                                         resource_size(addr_phys[0]),
 286                                         QBMAN_MEMREMAP_ATTR);
 287         if (!pcfg->addr_virt_ce) {
 288                 dev_err(dev, "memremap::CE failed\n");
 289                 goto err_ioremap1;
 290         }
 291
 292         pcfg->addr_virt_ci = ioremap(addr_phys[1]->start,
 293                                 resource_size(addr_phys[1]));
 294         if (!pcfg->addr_virt_ci) {
 295                 dev_err(dev, "ioremap::CI failed\n");
 296                 goto err_ioremap2;
 297         }
 298
 299         pcfg->pools = qm_get_pools_sdqcr();
 300
 301         spin_lock(&qman_lock);
 302         cpu = cpumask_next_zero(-1, &portal_cpus);
 303         if (cpu >= nr_cpu_ids) {
 304                 __qman_portals_probed = 1;
 305                 /* unassigned portal, skip init */
 306                 spin_unlock(&qman_lock);
 307                 return 0;
 308         }
 309
 310         cpumask_set_cpu(cpu, &portal_cpus);
 311         spin_unlock(&qman_lock);
 312         pcfg->cpu = cpu;
 313
 314         if (dma_set_mask(dev, DMA_BIT_MASK(40))) {
 315                 dev_err(dev, "dma_set_mask() failed\n");
 316                 goto err_portal_init;
 317         }
 318
 319         if (!init_pcfg(pcfg)) {
 320                 dev_err(dev, "portal init failed\n");
 321                 goto err_portal_init;
 322         }
 323
 324         /* clear irq affinity if assigned cpu is offline */
 325         if (!cpu_online(cpu))
 326                 qman_offline_cpu(cpu);
 327
 328         return 0;
 329
 330 err_portal_init:
 331         iounmap(pcfg->addr_virt_ci);
 332 err_ioremap2:
 333         memunmap(pcfg->addr_virt_ce);
 334 err_ioremap1:
 335         __qman_portals_probed = -1;
 336
 337         return -ENXIO;
 338 }
 339
 340 static const struct of_device_id qman_portal_ids[] = {
 341         {
 342                 .compatible = "fsl,qman-portal",
 343         },
 344         {}
 345 };
 346 MODULE_DEVICE_TABLE(of, qman_portal_ids);
 347
 348 static struct platform_driver qman_portal_driver = {
 349         .driver = {
 350                 .name = KBUILD_MODNAME,
 351                 .of_match_table = qman_portal_ids,
 352         },
 353         .probe = qman_portal_probe,
 354 };
 355
 356 static int __init qman_portal_driver_register(struct platform_driver *drv)
 357 {
 358         int ret;
 359
 360         ret = platform_driver_register(drv);
 361         if (ret < 0)
 362                 return ret;
 363
 364         ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
 365                                         "soc/qman_portal:online",
 366                                         qman_online_cpu, qman_offline_cpu);
 367         if (ret < 0) {
 368                 pr_err("qman: failed to register hotplug callbacks.\n");
 369                 platform_driver_unregister(drv);
 370                 return ret;
 371         }
 372         return 0;
 373 }
 374
 375 module_driver(qman_portal_driver,
 376               qman_portal_driver_register, platform_driver_unregister);